./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:25,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:25,820 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:48:25,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:25,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:25,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:25,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:25,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:25,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:25,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:25,855 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:25,856 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:25,857 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:25,857 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:25,858 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:25,859 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:25,860 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:25,860 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:25,861 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:25,862 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:25,863 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:25,863 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:25,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:25,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:25,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:25,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:25,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:25,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:25,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:25,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:25,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:25,871 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:25,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:25,872 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:25,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:25,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:25,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:25,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:25,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:25,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:25,875 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:25,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:25,876 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:25,877 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:25,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:25,878 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 [2023-11-19 04:48:26,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:26,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:26,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:26,156 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:26,160 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:26,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2023-11-19 04:48:29,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:29,711 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:29,712 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2023-11-19 04:48:29,740 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/data/8c30fb878/a79a8166ac884e4e8d257cd91a1c3daa/FLAG194e8d9de [2023-11-19 04:48:29,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/data/8c30fb878/a79a8166ac884e4e8d257cd91a1c3daa [2023-11-19 04:48:29,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:29,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:29,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:29,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:29,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:29,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:29" (1/1) ... [2023-11-19 04:48:29,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a348601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:29, skipping insertion in model container [2023-11-19 04:48:29,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:29" (1/1) ... [2023-11-19 04:48:29,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:30,097 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2023-11-19 04:48:30,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:30,534 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:30,544 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-19 04:48:30,546 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [68] [2023-11-19 04:48:30,546 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [77] [2023-11-19 04:48:30,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [171] [2023-11-19 04:48:30,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [270] [2023-11-19 04:48:30,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1873] [2023-11-19 04:48:30,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1991] [2023-11-19 04:48:30,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2342] [2023-11-19 04:48:30,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2708] [2023-11-19 04:48:30,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2743] [2023-11-19 04:48:30,551 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2023-11-19 04:48:30,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:30,730 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:30,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30 WrapperNode [2023-11-19 04:48:30,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:30,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:30,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:30,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:30,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,817 INFO L138 Inliner]: procedures = 94, calls = 346, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 872 [2023-11-19 04:48:30,818 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:30,818 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:30,819 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:30,819 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:30,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,889 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,935 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:30,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:30,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:30,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:30,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (1/1) ... [2023-11-19 04:48:30,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:31,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:31,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-19 04:48:31,066 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-19 04:48:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:48:31,067 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:48:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 04:48:31,067 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 04:48:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:48:31,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:31,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:48:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-19 04:48:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-19 04:48:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:48:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:48:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:48:31,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:48:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:48:31,072 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:48:31,072 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 04:48:31,074 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 04:48:31,074 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:48:31,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:48:31,075 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:48:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:48:31,075 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:48:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:48:31,075 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:48:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:48:31,075 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:48:31,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:48:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:48:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:48:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:48:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:48:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:48:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:48:31,076 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:48:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:48:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:48:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:48:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:48:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:48:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:48:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:48:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:48:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:48:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:48:31,078 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:48:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:48:31,078 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:48:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:48:31,079 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:48:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:48:31,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:48:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:48:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:48:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:48:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:48:31,303 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:31,306 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:32,697 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:33,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:33,648 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:48:33,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:33 BoogieIcfgContainer [2023-11-19 04:48:33,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:33,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:33,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:33,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:33,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:29" (1/3) ... [2023-11-19 04:48:33,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ffc712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:33, skipping insertion in model container [2023-11-19 04:48:33,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:30" (2/3) ... [2023-11-19 04:48:33,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ffc712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:33, skipping insertion in model container [2023-11-19 04:48:33,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:33" (3/3) ... [2023-11-19 04:48:33,676 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2023-11-19 04:48:33,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:33,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:33,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:33,793 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4551b3c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:33,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 298 states have (on average 1.5771812080536913) internal successors, (470), 316 states have internal predecessors, (470), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 04:48:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 04:48:33,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:33,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:33,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:33,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 768095820, now seen corresponding path program 1 times [2023-11-19 04:48:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:33,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759208127] [2023-11-19 04:48:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:33,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:48:34,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:34,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759208127] [2023-11-19 04:48:34,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759208127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:34,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:34,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:48:34,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747138808] [2023-11-19 04:48:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:34,934 INFO L87 Difference]: Start difference. First operand has 436 states, 298 states have (on average 1.5771812080536913) internal successors, (470), 316 states have internal predecessors, (470), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 04:48:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:36,009 INFO L93 Difference]: Finished difference Result 1276 states and 2046 transitions. [2023-11-19 04:48:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-11-19 04:48:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:36,063 INFO L225 Difference]: With dead ends: 1276 [2023-11-19 04:48:36,064 INFO L226 Difference]: Without dead ends: 845 [2023-11-19 04:48:36,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:36,083 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 650 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:36,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 2801 Invalid, 438 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:48:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-11-19 04:48:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2023-11-19 04:48:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 579 states have (on average 1.5613126079447324) internal successors, (904), 609 states have internal predecessors, (904), 206 states have call successors, (206), 54 states have call predecessors, (206), 51 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2023-11-19 04:48:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1320 transitions. [2023-11-19 04:48:36,241 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1320 transitions. Word has length 96 [2023-11-19 04:48:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:36,243 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1320 transitions. [2023-11-19 04:48:36,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 04:48:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1320 transitions. [2023-11-19 04:48:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 04:48:36,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:36,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:36,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:36,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:36,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash -319815266, now seen corresponding path program 1 times [2023-11-19 04:48:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:36,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352284456] [2023-11-19 04:48:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:48:36,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352284456] [2023-11-19 04:48:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352284456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996617110] [2023-11-19 04:48:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:36,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:36,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:36,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:36,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:36,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:37,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996617110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-19 04:48:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98662751] [2023-11-19 04:48:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:37,057 INFO L87 Difference]: Start difference. First operand 837 states and 1320 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:37,343 INFO L93 Difference]: Finished difference Result 1671 states and 2655 transitions. [2023-11-19 04:48:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 100 [2023-11-19 04:48:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:37,354 INFO L225 Difference]: With dead ends: 1671 [2023-11-19 04:48:37,354 INFO L226 Difference]: Without dead ends: 849 [2023-11-19 04:48:37,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:37,361 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 85 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:37,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1791 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-11-19 04:48:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2023-11-19 04:48:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 589 states have (on average 1.5551782682512734) internal successors, (916), 619 states have internal predecessors, (916), 206 states have call successors, (206), 56 states have call predecessors, (206), 53 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2023-11-19 04:48:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1332 transitions. [2023-11-19 04:48:37,437 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1332 transitions. Word has length 100 [2023-11-19 04:48:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:37,438 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1332 transitions. [2023-11-19 04:48:37,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1332 transitions. [2023-11-19 04:48:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:48:37,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:37,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:37,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 04:48:37,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:37,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1972101525, now seen corresponding path program 1 times [2023-11-19 04:48:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:37,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147292439] [2023-11-19 04:48:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:48:37,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147292439] [2023-11-19 04:48:37,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147292439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69784413] [2023-11-19 04:48:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:37,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:37,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:38,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:38,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:48:38,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69784413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:38,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 04:48:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123020710] [2023-11-19 04:48:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:38,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:38,336 INFO L87 Difference]: Start difference. First operand 849 states and 1332 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:38,582 INFO L93 Difference]: Finished difference Result 1689 states and 2665 transitions. [2023-11-19 04:48:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2023-11-19 04:48:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:38,593 INFO L225 Difference]: With dead ends: 1689 [2023-11-19 04:48:38,594 INFO L226 Difference]: Without dead ends: 847 [2023-11-19 04:48:38,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:38,606 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 91 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:38,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1787 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-19 04:48:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2023-11-19 04:48:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 587 states have (on average 1.546848381601363) internal successors, (908), 617 states have internal predecessors, (908), 206 states have call successors, (206), 56 states have call predecessors, (206), 53 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2023-11-19 04:48:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1324 transitions. [2023-11-19 04:48:38,672 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1324 transitions. Word has length 102 [2023-11-19 04:48:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:38,673 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1324 transitions. [2023-11-19 04:48:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1324 transitions. [2023-11-19 04:48:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 04:48:38,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:38,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:38,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:38,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:38,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:38,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1886580511, now seen corresponding path program 1 times [2023-11-19 04:48:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964470502] [2023-11-19 04:48:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:48:39,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:39,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964470502] [2023-11-19 04:48:39,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964470502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:39,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165044043] [2023-11-19 04:48:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:39,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:39,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:39,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:39,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:39,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165044043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:39,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:39,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 04:48:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101138323] [2023-11-19 04:48:39,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:39,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:39,696 INFO L87 Difference]: Start difference. First operand 847 states and 1324 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:40,795 INFO L93 Difference]: Finished difference Result 2071 states and 3280 transitions. [2023-11-19 04:48:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 103 [2023-11-19 04:48:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:40,807 INFO L225 Difference]: With dead ends: 2071 [2023-11-19 04:48:40,807 INFO L226 Difference]: Without dead ends: 1239 [2023-11-19 04:48:40,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:48:40,815 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 638 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:40,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 2120 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:48:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-11-19 04:48:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1219. [2023-11-19 04:48:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 844 states have (on average 1.4928909952606635) internal successors, (1260), 889 states have internal predecessors, (1260), 294 states have call successors, (294), 84 states have call predecessors, (294), 80 states have return successors, (322), 282 states have call predecessors, (322), 289 states have call successors, (322) [2023-11-19 04:48:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1876 transitions. [2023-11-19 04:48:40,897 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1876 transitions. Word has length 103 [2023-11-19 04:48:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:40,898 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1876 transitions. [2023-11-19 04:48:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1876 transitions. [2023-11-19 04:48:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:48:40,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:40,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:40,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:41,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:41,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:41,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -130362641, now seen corresponding path program 1 times [2023-11-19 04:48:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64220665] [2023-11-19 04:48:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:48:41,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64220665] [2023-11-19 04:48:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64220665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498842234] [2023-11-19 04:48:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:41,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:41,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:41,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:48:41,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:48:42,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:42,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498842234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:42,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:42,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-19 04:48:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434546529] [2023-11-19 04:48:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:42,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:48:42,017 INFO L87 Difference]: Start difference. First operand 1219 states and 1876 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:42,942 INFO L93 Difference]: Finished difference Result 2650 states and 4075 transitions. [2023-11-19 04:48:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:48:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 104 [2023-11-19 04:48:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:42,957 INFO L225 Difference]: With dead ends: 2650 [2023-11-19 04:48:42,957 INFO L226 Difference]: Without dead ends: 1446 [2023-11-19 04:48:42,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:48:42,971 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 771 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:42,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 3282 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:48:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-11-19 04:48:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1427. [2023-11-19 04:48:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1005 states have (on average 1.4796019900497512) internal successors, (1487), 1048 states have internal predecessors, (1487), 318 states have call successors, (318), 108 states have call predecessors, (318), 103 states have return successors, (373), 307 states have call predecessors, (373), 311 states have call successors, (373) [2023-11-19 04:48:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2178 transitions. [2023-11-19 04:48:43,098 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2178 transitions. Word has length 104 [2023-11-19 04:48:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,098 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 2178 transitions. [2023-11-19 04:48:43,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2178 transitions. [2023-11-19 04:48:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:48:43,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:43,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:43,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:43,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash -461333832, now seen corresponding path program 1 times [2023-11-19 04:48:43,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709121754] [2023-11-19 04:48:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:43,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709121754] [2023-11-19 04:48:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709121754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821773071] [2023-11-19 04:48:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:43,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:48:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:43,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:48:43,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821773071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 04:48:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250509976] [2023-11-19 04:48:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:43,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:43,955 INFO L87 Difference]: Start difference. First operand 1427 states and 2178 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,186 INFO L93 Difference]: Finished difference Result 2860 states and 4403 transitions. [2023-11-19 04:48:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 104 [2023-11-19 04:48:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:44,207 INFO L225 Difference]: With dead ends: 2860 [2023-11-19 04:48:44,207 INFO L226 Difference]: Without dead ends: 1456 [2023-11-19 04:48:44,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:44,255 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:44,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2525 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2023-11-19 04:48:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1439. [2023-11-19 04:48:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1014 states have (on average 1.47534516765286) internal successors, (1496), 1057 states have internal predecessors, (1496), 318 states have call successors, (318), 108 states have call predecessors, (318), 106 states have return successors, (376), 310 states have call predecessors, (376), 311 states have call successors, (376) [2023-11-19 04:48:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2190 transitions. [2023-11-19 04:48:44,372 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2190 transitions. Word has length 104 [2023-11-19 04:48:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:44,374 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2190 transitions. [2023-11-19 04:48:44,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2190 transitions. [2023-11-19 04:48:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:48:44,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:44,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:44,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:44,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:44,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:44,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1336051169, now seen corresponding path program 1 times [2023-11-19 04:48:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925629847] [2023-11-19 04:48:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:44,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925629847] [2023-11-19 04:48:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925629847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057462477] [2023-11-19 04:48:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:44,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:44,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:48:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:45,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:48:45,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057462477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:45,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 04:48:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047605390] [2023-11-19 04:48:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:45,266 INFO L87 Difference]: Start difference. First operand 1439 states and 2190 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,613 INFO L93 Difference]: Finished difference Result 2929 states and 4525 transitions. [2023-11-19 04:48:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2023-11-19 04:48:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,625 INFO L225 Difference]: With dead ends: 2929 [2023-11-19 04:48:45,626 INFO L226 Difference]: Without dead ends: 1514 [2023-11-19 04:48:45,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:45,639 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 19 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1739 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2023-11-19 04:48:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1496. [2023-11-19 04:48:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1071 states have (on average 1.4836601307189543) internal successors, (1589), 1114 states have internal predecessors, (1589), 318 states have call successors, (318), 108 states have call predecessors, (318), 106 states have return successors, (376), 310 states have call predecessors, (376), 311 states have call successors, (376) [2023-11-19 04:48:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2283 transitions. [2023-11-19 04:48:45,759 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2283 transitions. Word has length 106 [2023-11-19 04:48:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,760 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2283 transitions. [2023-11-19 04:48:45,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2283 transitions. [2023-11-19 04:48:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 04:48:45,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:45,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:45,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:45,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1034295157, now seen corresponding path program 1 times [2023-11-19 04:48:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465682529] [2023-11-19 04:48:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:46,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465682529] [2023-11-19 04:48:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465682529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135517850] [2023-11-19 04:48:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:46,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:46,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:48:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:46,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:46,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:46,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135517850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:46,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-19 04:48:46,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928871111] [2023-11-19 04:48:46,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:46,643 INFO L87 Difference]: Start difference. First operand 1496 states and 2283 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:47,754 INFO L93 Difference]: Finished difference Result 3578 states and 5662 transitions. [2023-11-19 04:48:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 108 [2023-11-19 04:48:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:47,775 INFO L225 Difference]: With dead ends: 3578 [2023-11-19 04:48:47,776 INFO L226 Difference]: Without dead ends: 2519 [2023-11-19 04:48:47,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:47,789 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 645 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:47,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 2199 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:48:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2023-11-19 04:48:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2466. [2023-11-19 04:48:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1767 states have (on average 1.4770797962648556) internal successors, (2610), 1836 states have internal predecessors, (2610), 520 states have call successors, (520), 180 states have call predecessors, (520), 178 states have return successors, (737), 510 states have call predecessors, (737), 509 states have call successors, (737) [2023-11-19 04:48:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3867 transitions. [2023-11-19 04:48:47,977 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3867 transitions. Word has length 108 [2023-11-19 04:48:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:47,977 INFO L495 AbstractCegarLoop]: Abstraction has 2466 states and 3867 transitions. [2023-11-19 04:48:47,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3867 transitions. [2023-11-19 04:48:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 04:48:47,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:47,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:48,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:48:48,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:48,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1231009953, now seen corresponding path program 1 times [2023-11-19 04:48:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039097922] [2023-11-19 04:48:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:48,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039097922] [2023-11-19 04:48:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039097922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:48,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008443883] [2023-11-19 04:48:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:48,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:48,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:48,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:48,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:48:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:48,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:48,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:48:48,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008443883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:48,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-19 04:48:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877401635] [2023-11-19 04:48:48,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:48,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:48,736 INFO L87 Difference]: Start difference. First operand 2466 states and 3867 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:49,025 INFO L93 Difference]: Finished difference Result 4972 states and 7958 transitions. [2023-11-19 04:48:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2023-11-19 04:48:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:49,048 INFO L225 Difference]: With dead ends: 4972 [2023-11-19 04:48:49,048 INFO L226 Difference]: Without dead ends: 2530 [2023-11-19 04:48:49,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:49,078 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 5 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:49,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1257 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2023-11-19 04:48:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2476. [2023-11-19 04:48:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 1777 states have (on average 1.4642656162070906) internal successors, (2602), 1846 states have internal predecessors, (2602), 520 states have call successors, (520), 180 states have call predecessors, (520), 178 states have return successors, (737), 510 states have call predecessors, (737), 509 states have call successors, (737) [2023-11-19 04:48:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 3859 transitions. [2023-11-19 04:48:49,260 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 3859 transitions. Word has length 108 [2023-11-19 04:48:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:49,260 INFO L495 AbstractCegarLoop]: Abstraction has 2476 states and 3859 transitions. [2023-11-19 04:48:49,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:48:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 3859 transitions. [2023-11-19 04:48:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 04:48:49,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:49,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:49,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:49,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:48:49,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -386165106, now seen corresponding path program 1 times [2023-11-19 04:48:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142279627] [2023-11-19 04:48:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:49,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:49,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142279627] [2023-11-19 04:48:49,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142279627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:49,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521065880] [2023-11-19 04:48:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:49,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:49,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:49,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:48:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:50,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:50,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:50,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:50,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521065880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:50,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:50,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-19 04:48:50,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226407871] [2023-11-19 04:48:50,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:50,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:50,141 INFO L87 Difference]: Start difference. First operand 2476 states and 3859 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:51,301 INFO L93 Difference]: Finished difference Result 5527 states and 8868 transitions. [2023-11-19 04:48:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2023-11-19 04:48:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:51,332 INFO L225 Difference]: With dead ends: 5527 [2023-11-19 04:48:51,333 INFO L226 Difference]: Without dead ends: 3493 [2023-11-19 04:48:51,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:51,353 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 679 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:51,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 2027 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:48:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2023-11-19 04:48:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3444. [2023-11-19 04:48:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2471 states have (on average 1.462161068393363) internal successors, (3613), 2566 states have internal predecessors, (3613), 722 states have call successors, (722), 252 states have call predecessors, (722), 250 states have return successors, (1171), 710 states have call predecessors, (1171), 707 states have call successors, (1171) [2023-11-19 04:48:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5506 transitions. [2023-11-19 04:48:51,626 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5506 transitions. Word has length 109 [2023-11-19 04:48:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:51,627 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 5506 transitions. [2023-11-19 04:48:51,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5506 transitions. [2023-11-19 04:48:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 04:48:51,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:51,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:51,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:51,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:51,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash -376486709, now seen corresponding path program 1 times [2023-11-19 04:48:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409465916] [2023-11-19 04:48:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:52,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:52,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409465916] [2023-11-19 04:48:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409465916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:52,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173284141] [2023-11-19 04:48:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:52,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:52,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:52,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:48:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:52,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:52,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:52,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:52,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173284141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:52,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:52,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-19 04:48:52,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341742481] [2023-11-19 04:48:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:52,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:52,558 INFO L87 Difference]: Start difference. First operand 3444 states and 5506 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:53,948 INFO L93 Difference]: Finished difference Result 7369 states and 12029 transitions. [2023-11-19 04:48:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 110 [2023-11-19 04:48:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:53,992 INFO L225 Difference]: With dead ends: 7369 [2023-11-19 04:48:53,993 INFO L226 Difference]: Without dead ends: 4370 [2023-11-19 04:48:54,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:54,013 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 679 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:54,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 2209 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:48:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2023-11-19 04:48:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4237. [2023-11-19 04:48:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 3011 states have (on average 1.4613085353703088) internal successors, (4400), 3130 states have internal predecessors, (4400), 913 states have call successors, (913), 317 states have call predecessors, (913), 312 states have return successors, (1586), 898 states have call predecessors, (1586), 895 states have call successors, (1586) [2023-11-19 04:48:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 6899 transitions. [2023-11-19 04:48:54,357 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 6899 transitions. Word has length 110 [2023-11-19 04:48:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:54,358 INFO L495 AbstractCegarLoop]: Abstraction has 4237 states and 6899 transitions. [2023-11-19 04:48:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:48:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 6899 transitions. [2023-11-19 04:48:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 04:48:54,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:54,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:54,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:54,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:48:54,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:54,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 797144889, now seen corresponding path program 1 times [2023-11-19 04:48:54,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:54,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437221607] [2023-11-19 04:48:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 04:48:54,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437221607] [2023-11-19 04:48:54,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437221607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340584777] [2023-11-19 04:48:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:54,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:54,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9a157d-bc05-415b-b65c-d95e77a2ce14/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 04:48:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:55,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:55,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:55,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340584777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:55,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430537291] [2023-11-19 04:48:55,548 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2023-11-19 04:48:55,549 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:55,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:55,559 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:55,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:14,337 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs